Zorki-4 -1956-73. Identical to the Zorki 3C, but with self-timer. Jupiter-8 f2/50mm or lndustar-50 f3.5/ 50mm. Focal-plane shutter 1-1000. The most common Zorki, more than 1.7 million made. Later models have 42mm screwmount (not interchangeable with Zenit lenses.) Variants: with or without viewfinder bezel, different graphics of Zorki-4 name in Cyrillic and Latin.Zorkl-4 'Anniversary' - Various series of anniversary models during the 17 years of production of the Zorki-4. Youth Festival . 50 Years October . Aurora . 50 Years Soviet Power 1967. This jubilee model of the camera was produced to commemorate the Fiftieth anniversary of the Soviet power 1917-1967.